Rotary rivet-spinning machine.



J. G. KINGSBURY. BQTAEY FJVET SPINNING MACHINE. APPLiGATIOH rum) we. 16. 1909.

Patented May 16, 1911.

8 11 van tow l I have discovered that if-tliis screw be 1005- l NITED STATES J3EE G. KIHGSBUBY, 0F BBIDGEPOET, CC-NNECTICUTJASSIGNOR TO THE GRANT MANU- FACTUBING d: MACHINE COMPANY, OF BRIDGEPORT, CONNECTICUT, A CGILPORA- T1631 01 CGHNECTICUT.

BQTABY BURT-SPINNING- M ACHINE.

Patented May 16, 1911.-

Application filed August 16, 1809. Serial No. maria.

at? whom it may concern:

Be it known that I, Jana G. Krxosimnr, a citizen of the United States, residing at Bridgeport, in the county of F airfield and State of Connecticut, have invented certain new and useful Improvements in Rotary Rivet Spinning' Machines; and I do hereby declare the followinq to be a full, clear, and exact description 0? i will enable others skilled in the art to which it appertnins to make and use the same.

My invention relates to rotary rivet spinning machines.- Its object is to provide a rollholder for rivet spinnin machines which mny be readily assembled and at the same time capable of the severest work withoutv danger of injury or Inferring or break- ,ing 'of the roll-axis. The riveter is of a type in which twin rolls are placed in a hohler at a slight angle, that .S, with the outer peripheri s met-ting at the. bottom and separated at the top, and in which the rolls turn upon a traz vers axis passing through one end of :1 hole. .pted to be screwed into place on a rivet spinning machine.

In the customer rivet spinning machines the shaft of the roli-holderis a screwliolt pa sing through a threaded perforation in the roll-holding end of the holder, which serves also to hold from springing the sides of jaws of the holder. n operation this screw-shaft is apt to wear loose and sometimes files out in operation. Furthermore,

ened in any degree it will not then prevent the separated parts, sides or jaws of the holder in which the rolls turn from spring ingz apart in operation. Such a springing of the. jaws of the holder is objectionable lie-muse itlmives space enough to form a lmr or teat on the rivet.

In up; improved roll-holder I have proviide d a tapering body which is threadedat the bottom to receive a threaded rm which embraces the jaws of the roll-ho] er per-Z inittingme to use a simple pin as the axis 0'! shaft of the rolls and to either have a free 31' a driving fit for the pin, and enabling me to readily assemble the parts, preventing the pi-ending of the jaws of the holder, and so preventing a displacement of the axis #1- on .01 the the invention, such as I applied to the spinning machine, with a partof the ring removed to show the threads; Fig. 2 is a central vertical section.

In the drawings, 1 represents the body of the roll'helder having the usual polygonal head 2, and an internal thread 3 for attaching therolhholder to the s inning machine. The bottom part of the od (If the rollholder is slightly tapered downwardly and is threaded upon a substantially central zone 5. Twin rolls, 6, are borne by a pin 7, which passes through a transverse hole in the jaws of the holder. The two rolls turn in a cut 8 which forms the jaws and is wider at t e top than at the bottom as illustrated in the. figures, and, which, at the to is divided into two parts by a downward y projecting fin 9 left thus when the body is cut away to form the space to receive the rolls. A ring 10, tapered reversely with reference to the holder, is threaded at 11 to engage with the threads 5 screwed into place it will at once prevent the jaws of the holder from spreading in operation and also secure in place the pin 7, preventing it from being displaced or broken or lost in o ration. The ring has the usual wrench no 2 12. At 13 I have illustrated oil holes which are features of a se arate invention ofmine, especially app icable to such .devices. but not necessary to further tion.

While the specific construction and arrangement of the rolls and the manner of their relative placing in the roll-holder is not a feature of this in'vention ,-it may wellto say that the manner in which they are separated at. the top and meet at the bottom prevents small particles of metal from constantly wedging or sticking in the roll-bolder while the rivet heads are being spun down. These little particles of metal are squeezed in between the rolls at the apex of the angi: and at times, for instance if the machine spindle is stopped and an attempt is made to turn the rolls with the fingers, they will be found tightly wed ed. When the next rivet is operated upon t to rolls will touch the top or the point of the rivet at its outer edge, owing to the,curvature of the rolls, and by the pressure necessary to roll the head down there will he friction enough of the roll-holder so that when this ring isdwell upon in the description of this inven- .to permit the rolls to slightly move. -soon as this movement :iieates the special :ulvaninge'of my con-4 I the aws and strilction which euahles this strain to he put uponthe rolls without any danger of spreading the jaws or displacing the rollshaft.

I claim: 1. in a roll-holder whines, the combination of a pair of threadeil, tapering 1aws, a shaft journaletl in the for rivet. spinning ma- 5 jaws, rolls carried by the shaft and a threaded, talpering ring binding the jaws.

2'. n v chines, the combination of a panof jaws, rolls between the jaws, a free shaft-pin passing through the jaws, and a ring binding the jaws and the ends of the shaft.

3. In a, roll-holder for rivet s inning ma-' chines, tlxewombination of a he y having a. substantially central zone of threading, a cut forming iaws, rolls between the jaws, and a partial y threaded ring to take over screw upon the threaded zone. In testimony whereof I have heriinto signed my name in the presence of two subscribing witnesses. JERE G. KINGSBURY.

Witnesses: v r l:l"'* 'ABD P. Nouns, Jens Sm'rn.

a roll-holder for 'rlvet spinning ma I 

